<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>
<script>
    function F(){

    }
    F.a = 10;
    F.b = 20;
    var E = F;
    E.max = function (x,y) {
        if (x>y){
            return x;
        } else {
            return y
        }
    }
    E = 10;

//    console.log(F.a);
    console.log(E.max(10,20));
</script>

</body>
</html>